A new ISO standard has recently been published and is now available from NFPA.
ISO 2942:2004, Hydraulic fluid power - Filter elements - Verification of fabrication integrity and determination of the first bubble point (fourth edition)
This International Standard specifies a bubble-point test method applicable to filter elements used in hydraulic fluid power systems. It can be used either to verify the fabrication integrity of a filter element by checking the absence of bubbles or to permit the localization of the largest pore of the filtering medium by determining the first bubble point.
To order, contact NFPA's publications department call (414) 778-3353, fax ( 414) 778- 3361, e-mail at pubsales@nfpa.com, or visit www.nfpa.com and select "Online Store."